The Committee to Protect Journalists is adding its voice of concern about the U.S. Justice Department’s investigation into Fox News correspondent James Rosen.

“U.S. government efforts to prosecute leakers by obtaining information from journalists has a chilling effect domestically and sends a terrible message to journalists around the world who are fighting to resist government intrusion,” said CPJ Executive Director Joel Simon.

On Sunday, the Washington Post reported on an affidavit that described Rosen as “an aider, abettor and/or co-conspirator” in a 2010 DOJ investigation into the leak of classified information regarding North Korea. The Justice Department tracked Rosen’s State Department comings and goings through his security badge and also tapped into his personal email and phone records.

Fox News told TVNewser yesterday they will “unequivocally defend [Rosen’s] right to operate as a member of what up until now has always been a free press.”